PivotTable.NullString Property (Excel)

Returns or sets the string displayed in cells that contain null values when the DisplayNullString property is True. The default value is an empty string (""). Read/write String.

expression .NullString

expression A variable that represents a PivotTable object.

This example causes the PivotTable report to display "NA" in cells that contain null values.

With Worksheets(1).PivotTables("Pivot1") 
 .NullString = "NA" 
 .DisplayNullString = True 
End With